HD 221246
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 23h 30m 07.4133s[1] |
Declination | +49° 07′ 59.3232″[1] |
Apparent magnitude (V) | 6.17[2] |
Characteristics | |
Spectral type | K3III[3] |
U−B color index | 1.71[2] |
B−V color index | 1.46[2] |
Astrometry | |
Radial velocity (Rv) | −8.41±0.15[4] km/s |
Proper motion (μ) | RA: 28.741±0.100[1] mas/yr Dec.: 3.180±0.087[1] mas/yr |
Parallax (π) | 3.2290 ± 0.0642 mas[1] |
Distance | 1,010 ± 20 ly (310 ± 6 pc) |
Details | |
Radius | 48[5] R☉ |
Surface gravity (log g) | 2.32[6] cgs |
Temperature | 4228±125[6] K |
Metallicity [Fe/H] | −0.24±0.10[6] dex |
Other designations | |
Database references | |
SIMBAD | data |
HD 221246 or NGC 7686 1 is a star in open cluster NGC 7686, and it belongs to the northern constellation of Andromeda. With an apparent visual magnitude of 6.17,[2] it can be viewed by the naked eye only under very favourable conditions. It has a spectral classification of K3III, meaning it is an evolved orange giant star.[3] Parallax measurements place this star about 1,000 light years away from the solar system.[1]
References
[edit]- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
- ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- ^ Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics, 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754
- ^ a b c Röck, B.; Vazdekis, A.; Peletier, R. F.; Knapen, J. H.; Falcón-Barroso, J. (2015). "Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library". Monthly Notices of the Royal Astronomical Society. 449 (3): 2853. arXiv:1505.01837. Bibcode:2015MNRAS.449.2853R. doi:10.1093/mnras/stv503.